Historical Perspectives on CBCT

Farman, Allan G.; Scarfe, William C.

doi:10.1007/978-3-319-62061-9_1

Cited by 6 publications

(6 citation statements)

References 26 publications

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“…Dental cone beam computed tomography (CBCT), a diagnostic imaging technique, is widely used for dental diseases and dental problems researching [1]. The segmentation of individual tooth in CBCT images facilitates the observation of slices or volumes of the target tooth by dentists, thereby enabling more precise diagnostic decision-making and treatment planning.…”

Section: Introductionmentioning

confidence: 99%

Automatic Segmentation of Individual Tooth in Dental CBCT Images From Tooth Surface Map by a Multi-Task FCN

Chen

Yun

et al. 2020

IEEE Access

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Accurate and automatic segmentation of individual tooth is critical for computer-aided analysis towards clinical decision support and treatment planning. Three-dimensional reconstruction of individual tooth after the segmentation also plays an important role in simulation in digital orthodontics. However, it is difficult to automatically segment individual tooth in cone beam computed tomography (CBCT) images due to the blurring boundaries of neighboring teeth and the similar intensities between teeth and mandible bone. In this work, we propose the use of a multi-task 3D fully convolutional network (FCN) and marker-controlled watershed transform (MWT) to segment individual tooth. The multi-task FCN learns to simultaneously predict the probability of tooth region and the probability of tooth surface. Through the combination of the tooth probability gradient map and the surface probability map as the input image, MWT is used to automatically separate and segment individual tooth. Twenty-five dental CBCT scans are used in the study. The average Dice similarity coefficient, Jaccard index, and relative volume difference are 0.936 (±0.012), 0.881 (±0.019), and 0.072 (±0.027), respectively, and the average symmetric surface distance is 0.363 (±0.145) mm for our method. The experimental results demonstrate that the multi-task 3D FCN combined with MWT can segment individual tooth of various types in dental CBCT images.INDEX TERMS Individual tooth segmentation, dental CBCT, deep learning, marker-controlled watershed transform.

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Section: Introductionmentioning

confidence: 99%

Automatic Segmentation of Individual Tooth in Dental CBCT Images From Tooth Surface Map by a Multi-Task FCN

Chen

Yun

et al. 2020

IEEE Access

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“… 161 These advances were quickly followed by a large number of successful commercial FPCT offerings. Farman and Scarf 162 and Molteni 163 each have a detailed history and summary of FPCT head imaging systems. The success and development of dedicated CBCT continue to broaden and extend to other applications including extremities imaging.…”

Section: Dedicated Head and Extremities Flat-panel Cbctmentioning

confidence: 99%

Flat-panel conebeam CT in the clinic: history and current state

et al. 2021

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. Research into conebeam CT concepts began as soon as the first clinical single-slice CT scanner was conceived. Early implementations of conebeam CT in the 1980s focused on high-contrast applications where concurrent high resolution ( ), for visualization of small contrast-filled vessels, bones, or teeth, was an imaging requirement that could not be met by the contemporaneous CT scanners. However, the use of nonlinear imagers, e.g., x-ray image intensifiers, limited the clinical utility of the earliest diagnostic conebeam CT systems. The development of consumer-electronics large-area displays provided a technical foundation that was leveraged in the 1990s to first produce large-area digital x-ray detectors for use in radiography and then compact flat panels suitable for high-resolution and high-frame-rate conebeam CT. In this review, we show the concurrent evolution of digital flat panel (DFP) technology and clinical conebeam CT. We give a brief summary of conebeam CT reconstruction, followed by a brief review of the correction approaches for DFP-specific artifacts. The historical development and current status of flat-panel conebeam CT in four clinical areas—breast, fixed C-arm, image-guided radiation therapy, and extremity/head—is presented. Advances in DFP technology over the past two decades have led to improved visualization of high-contrast, high-resolution clinical tasks, and image quality now approaches the soft-tissue contrast resolution that is the standard in clinical CT. Future technical developments in DFPs will enable an even broader range of clinical applications; research in the arena of flat-panel CT shows no signs of slowing down.

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“…In order to overcome these drawbacks of conventional radiographic technique, Cone-beam computerized tomography (CBCT) based on a cone-shaped X-ray beam centered on a twodimensional (2D) detector is being used. It has an excellent high-contrast resolution as a result of the small size and the geometry of its isotropic voxels which is equal in all three dimensions [3,6,7].…”

Section: Introductionmentioning

confidence: 99%

“…CBCT scanners for the oral and maxillofacial (OMF) region were pioneered in the late 1990s independently by Arai et al, in Japan and Mozzo et al,. A patent application for the first commercially successful maxillofacial CBCT was made in Italy in 1995 with Attilio Tacconi and Piero Mozzo as co-inventors and the system was designed and produced by QR, Inc. of Verona which is now known as Cefla company [18]. The cone-shaped beam rotates 360° around the patient and is capable of producing hundreds of 2D images of a defined anatomical volume which are reconstructed into a voxel (digital) volume for visualization and analysis using a variation of the algorithm developed by Feldkamp in 1994 [19,20].…”

Section: Introductionmentioning

confidence: 99%

CBCT- A Boon for Implant Dentistry

Ali¹,

Khanam²,

K³

et al. 2019

SJODR

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The success of the treatment rendered depends on the accurate diagnosis and proper treatment planning based on the fundamental principles. The inception of CBCT into Implant dentistry, along with its wide range of application such as in the evaluation of TMJ, assessment of pathologies in or affecting the bones, 3D reconstructions of the bones or in the fabrication of a prosthetic components of the face and jaws in the complex maxillofacial reconstructions has led to a tremendous impact on the confidence of the dentist in the intricate procedures like sinus lifts, ridge augmentations, extractions, and implant placements. This article gives an insight into the background, indications and benefits of CBCT in Prosthodontics and Image Guided Implantology.

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Historical Perspectives on CBCT

Cited by 6 publications

References 26 publications

Automatic Segmentation of Individual Tooth in Dental CBCT Images From Tooth Surface Map by a Multi-Task FCN

Automatic Segmentation of Individual Tooth in Dental CBCT Images From Tooth Surface Map by a Multi-Task FCN

Flat-panel conebeam CT in the clinic: history and current state

CBCT- A Boon for Implant Dentistry

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